Minimal continuous state-space parametrizations

@article{Veen1996MinimalCS,
  title={Minimal continuous state-space parametrizations},
  author={Alle-Jan van der Veen and Mats Viberg},
  journal={1996 8th European Signal Processing Conference (EUSIPCO 1996)},
  year={1996},
  pages={1-4}
}
We present a minimal continuous parametrization of all multivariate rational contractive transfer functions. In contrast to traditional minimal parametrizations, this parametrization does not contain any structural indices, which makes it very suitable for identification algorithms that use nonlinear optimization to estimate the parameters. 

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